The 3650-10-CF from Holland Shielding Systems is a Microwave Absorber with Absorption 10 to 18 dB, Frequency 1 to 18 GHz, Thickness 0.393 Inch/10 mm, Thickness 0.393 Inch, Thickness (mm) 10 mm. Tags: Foam Absorber. More details for 3650-10-CF can be seen below.